O-ortho(t-aminomethyl phenyl) neutral esters of pentavalent phosphorus acids



United States Patent 6 -11 Claims. 61. 260-313) The present invention relates to and has as its objects (thio)-phosphoric, -phosphonic or '-phosphinic acid esters of Z-aminomethyl phenols substituted in 4-position as well as processes for the production of such compounds.

More specifically this invention is concerned with phosphoric, phosphonic, phosphinic or thiophosphoric, -phosphonic and -phosphinie acid esters of the general formula Ra in which R meansa hydrogen or halogen atom, a nitro or alkyl group, R standsv for a halogen atom, a nitro,

alkoxy, alkylm'ercapto, alkylsulphoxyl. or alkyl sulphonyl group, whilst .R and R represent alkyl radicals or, together with the nitrogen atom, may form a heterocyclic 5- or 6-membered ring'system, optionallyinterrupted by further hetero atoms such as O, S, or N. R and R mean alkyl, aryl or alkoxy radicals or also dialkyl amino groups; finally, 11 means a whole number. from 1 to 3.

In accordance with the, present invention it has been found that Z-aminom'ethyl phenols of the formula R /R2 n Hg-N\ can be reacted with phosphoric, phosphonic, phosphinic or thionophosphoric, -phosphonic or -phosphinic acid halides, whereby compounds of the constitutionas given above are obtained.

In the last mentioned formula the symbols R, R R

acid halides.

Furthermore, it hasproved to be expedient to carry out the inventive reaction at slightly to moderately elevated temperatures (preferably 40 to 80 C.) and to heat the reaction mixture, after the starting components have been combined, for some more time (1 to 4 hours) with stirring.

The Z-aminomethyl phenols required as starting materials for the process according to the invention can be obtained by known methods in a Mannich-reaction from the corresponding phenols, susbtituted at least in 4-posiice tion, by reaction of the latter with formaldehyde and secondary amines in accordance with the following equation:

(cf. H. Hellmann and G. Opitz: a-Aminoalkylierung, Weinheim 1960, p. 140 if).

The (thio)-phosphoric phosphonic or -phosphinic acid esters obtainable according to the present invention are distinguished by excellent insecticidal properties.

The new compound very effectively kills insects like aphids, spider mites, caterpillars, flies, etc. They distinguish themselves especially by a very good contactinsecticidal activity and mostly alsov by a systemic and ovicidal action. At the same time they have anactivity on eating insects such as caterpillars. Most surprisingly they are of remarkable low toxicity against mammals. For these reasonsthe inventive products are to be used as pest control agents, especially in plant protection. They rn-ay be used in the same manner as other known phosphoric insecticides, i.e. in a concentration from about 0.00001% to about 1%, diluted or extended with suitable solid or liquid carriers or diluents. Examples of such solid carriers are talc, chalk, bentonite, clay and the like,

. as liquid carriers there may be mentioned Water (if with each other or with known insecticides, fertilizers,

etc.

As examples-for the special utility the inventive compounds of the following formulae have been tested against aplr'ds (compound II), spider mites (compound II), caterpillars (compound I) and flies (compounds I and II). Aqueous dilutions of these compounds have been prepared by mixing the active ingredients with the same amounts of dimethylformamide as an auxiliary solvent adding thereto 20% by Weight referred to active ingredient of a commercial emulsifier consisting of a benzyl hydroxy polyglycol ether containing about 10 to 15 glycol ethers, and diluting this premixture at last with water to the desired concentration indicated in the following paragraphs: The tests have been carried out as follows:

(a) Against aphids (species Doralis fabae): Heavily infested bean plants (Vicia faba) have been sprayed drip wet with solutions as prepared above. The effect has been determined after 24 hours by counting the dead pests In either on the surface of the soil or still remaining on the plants. The following results have been obtained:

Aqueous concentration Killing rate Compound (in percent active (in percent) ingredient/water) II 0.01 l 100 tained:

Aqueous concentration Killing rate Compound (in percent active (in percent) ingredient/water) II I 0. 01 I 1 100 1 Ovicidal activity.

Aqueous concentration Killing rate Compound (in percent active (in percent) ingredient/water) (d) Against flies: About 50 flies (Musca domestica) are placed under covered petri dishes in which drip wet filter papers have been placed which are sprayed with insecticidal solutions of concentrations as shown below. The living status of the flies has been determined after 24 hours. The following results have been obtained:

Aqueous concentration Killing rate Compound (in percent active (in percent) ingredient/water) I 0. 001 100 II 0.001 100 The invention as claimed is illustrated in more detail by way of the following examples.

Example 1 S om@1= (0 can),

I CHgN(CH3)2 98 g. (0.5 mol) of 2-N,N-dimethylaminomethyl-4-nitrophenol (M.P. 140 C.) are dissolved in 250 cc. of acetonitrile. 70 g. of dried and powdered potassium carbonate are added to this solution with stirring. The mixture is subsequently heated for 30 minutes, whist stirring,

at 60 C., then treated dropwise at the indicated temperature with 95 g. of 0,0-diethylthionophosphoric acid chloride and heated for about 2 hours with further stirring at 80 C. After cooling, the reaction mixture is diluted with 500 cc. of benzene, 500 cc. of water are then added thereto, the mixture is shaken and the phases are separated.

4 Finally, the benzene solution is washed several times with 100 cc. of water each time, then separated from the aqueous layer and dried over sodium sulphate. After the solvent has been removed under vacuum, 122 g. of the theoretical yield) of the 0,0-diethylthionophosphoric acid-O-(2-N,N-dimethylaminomethyl- 4 nitrophenyl)- ester are obtained in the form of an orange coloured water-insoluble oil.

Analysis.-Calculated for C H N O PS (molecular weight 348.4);P, 8.89%. Found: P, 8.84%.

Caterpillars and flies are completely destroyed by 0.001% solutions of the compound.

Example 2 60 g. of screened and dried potassium carbonate are added with stirring to a solution of 102 g. (0.4 mol) of 2-N,N-dimethylaminomethyl-3,4,6-trichlorophenol (M.P. 90 C.) in 250 cc. of acetonitrile, 76 g. of the 0,0-diethylthionophosphoric acid chlorides are subsequently added dropwise at 70 C. to the reaction mixture and the latter is heated for another 2 hours at 80 C. The mixture is then cooled to room temperature and subsequently worked up as described in Example 1. 185 g. (91% of the theoretical) of the 0,0-diethylthionophosphoric acid-O-(2- N,N-dimethylaminomethyl-3,4,6 trichlorophenyl) ester are obtained as a water-insoluble oil which, even under a high vacuum, cannot be distilled without decomposition.

Analysis.Calculated for C H Cl NO PS (mol. weight 406.7): P, 7.62%; S, 7.89%. Found: P, 7.88%; S, 8.31%.

Flies are killed to 95% by 0.001% solutions and spider mites are destroyed to by 0.01% solutions of the ester. Moreover the compound shows an ovicidal activity against the eggs of spider mites.

Example 3 CgH;

119 g. (0.5 mol) of 2-N,N-diethylaminomethyl-4-nitro- S-methylphenol (M.P. 116 C.) are dissolved in 250 cc. of acetonitrile, this solution is treated first with 70 g. of powdered and dried potassium carbonate and subsequently at 70 C. with 87 g. of ethyl-O-ethylthionophosphonic acid chloride. The reaction mixture is then heated for another 2 hours at 80 C. and worked up as described in the preceding examples. The ethyl O-ethylthionophosphonic acid O (2 N,N-diethylaminomethyli-nitro-S-methylphenyl) ester is obtained in the form of a colourless waterinsoluble oil. The yield amounts to 172 g. (92% of the theoretical) AI1alysis.Calculated for C H N O PS (molecular weight 374.4): P, 8.27%; S, 8.56%. Found: P, 8.09%; S, 8.56%.

Flies are completely destroyed by 0.001% solutions, aphids and spider mites by 0.01% solutions of the ester. The compound also possesses an ovicidal activity against the eggs of spider mites.

6 Example 4 Example f fi w ah iN--o-1 on a y I 3 fi/ Ni ah CHa-S- -OP H,N, I CgHs I I y i y Cta u 2 1 H 130 .g. (0.3 mol) of 2 N-methyLN-octadccylaminm L methyl-4-nitrop-henol (M.P. 62 0. are dissolved in 250 cc. of acetonitrile. g. of potassium carbonate are added to this solution, the reaction mixture is heated for V I l 10 minutes at C. and then treated dropwise, whilst Under reaction conditions analogous to those described stirring, ith 52, g. of bis-(N,N-dimethylamino;) phosin Examples 1 to 3, there a obtained, from. 95 g- (0. phorio acid chloride. The mixture is subsequently heated of 2wrwlidifiomethyl-4emethylmercepte-5-met1gy1 tor another 2 hours at to c. and then Worked up Phenol and 63 of diethylthionophosphinic acid de, as described in Example 1. 87 gr (99% of the theoretical 132 g. (92.5% of the theoretical amount) of the diethylyield) of the bis-(N,N-dimethyla'mino) phosphoric acidthionophosphinic acid 0-(Z-pyrrolidinomethyl-4-methyl- O (Z-N-methyl-N-octadecyl-aminomethyl-4-nitrophenyl) meroaptmS-methylphenyl) ester as a colourless Water-inester are obtained as a water-insoluble oil. soluble oil. v Analysis-Galculatd for C H57N4O P (molecular Analysis-Calculated cfor C H NOPS (molecular weight 568.8): P, 5.45%. Found: P, 5.44%. weight 357.5): P. 8.66%. Found: P, 8,27%. Caterpillars are completely destroyed by 0.1% solutions Flies and aphids are killed to %by 0.1% solutions of the ester. of the ester, spider mites are completely killed by 0.1% The following compounds are=obtained in an analogous solutions- I manner;

'Analysls P Insecticidal properties 7 Yield (percent of the Mo weight Concentratheoretical) Cale. Found Administration tion of active Killing rate (percent) (percent) against ingredient -(in percent) y (inpercent) 0 N OP(O oil-15); 90 376.4 8.23 8.22 Caterpillars 0.1

. v V ZHZN(C2Hs)2 c1 I i fi i fi iifiiiiil 318i 83 (IIH2N(C2HB)2 N02 1- 3 m-Jo-mo 02115): 98. 410.9 7. 54 7.62 {g g fz g5 (EH2N(C2H5)2 fi/OCzHs J 93 39H M0 iiii fiiijiiiiii 3:861 i33 i (32H: OH2N(C2H5)2 CH3 om-o-i mmh 84.5 358.4 8.64 8.60 igfifififlfff 8: HzN(C2H5)2 o1 93 38m -[5l3e2lh1ittjji13i 813i 113% omNwHm CH3 -1 w {e i2%-3i f?fi:::::: 3t 12% oHtNwHoi i. I o 002115 Q K 332-4 @iifiiiffiji: 8388i 38 1 01m 2N( 8)fl Analysis P Insecticidal properties Yield (percentotthe M01. weight Concentratheoretical) Calc. Found Administration tion of active Killing rate (percent) (percent) against mgredient (1n percent) L; 1 v (in percent) [Caterpillars 0. 1 100 lQ-O-P 81 432.1 7.16 1.44 Aphids 0,01 90 i V CzHs Cl CH N H O l i 0. 01 90 om-o-r ocnarm 95 7 374.4 8.27 8.87 {Zgiffiggllffi 0.301 V l CHaN H fi/OCzHs orns OP 92 373.5 8.29 8.61 {ggfi f*ff CZHfi v CHzN H 0.01 100 OzNO-P(O CH3): 83 348.4 8. so 8.51 gf 0'01 100 V 3 2N(CzHs)2 Il' s 0.001 100 omQ-o-rwcmm 75 586.8 5.3 6.2 {gf M01 100 I OH:

CHgN 1 Ovicidal action.

We claim: 1. The compound of the following formula OgN CH N(CH )g 2. The compound of the following formula 8 00 E OaN- 0l5 ca n H2N(C2H5)2 3. The compound of the following formula 8 00,115 ol o i z r s)2 4. The compound of the following formula 01 I ll OgN OP (0 2 5):

5. The compound of the following formula S O z s OgN- O/ a (CH3):

6. The compound of the following formula 8 II one-@o-m 0 02m 7. The compound of the following formula 8. A compound of the formula in which R stands for a member selected from the group consisting of hydrogen, halogen, nitro and lower alkyl having up to 4 carbon atoms, R stands for a member selected from the group consisting of halogen, nitro and lower alkyl mercapto having up to 4 carbon atoms, R stands for lower alkyl having up to 4 carbon atoms, R stands for alkyl having up to 18 carbon atoms, R and R when taken together with N stands for a member selected from the group consisting of pyrrolidine and morpholine, R and R stand for members selected from the group consisting of lower alkyl, lower alkoxy and lower dialkylamino, the lower alkyl and lower alkoxy in each case 9 1@ having up to 4 carbon atoms, X stands for a member in which R stands for lower alkyl having up to 4 carbon selected from the group consisting of oxygen and sulfur atoms, R stands for alkyl having up to 18 carbon atoms, and n stands for an integer of from 1 to 3. R and R stand for lower alkoxy having up to 4 carbon 9. A compound of the formula atoms.

i 5 11. A compound of the formula 1 0 -N02 CH3 R7 K K? N- H: /PO N on 9 10 R1 a (L in which R stands for lower alkyl having up to 4 carbon N H; atoms, R stands for alkyl having up to 18 carbon atoms a and R and R7 stand for lower alkoxy having up to 4 carbon atoms' 15 in which R st nds for lower alk lhavin u to 4 carbon 10. A compound of the formula 8 a y g p atoms, R stands for alkyl having up to 18 carbon atoms, R6 S R and R stand for lower alkoxy having up to 4 carbon \II atoms. N r 't d R7 20 0 re erences or e Ha IRVING MARCUS, Primary Examiner. Ra

NICHOLAS S. RIZZO, Examiner. 

1. THE COMPOUND OF THE FOLLOWING FORMULA
 8. A COMPOUND OF THE FORMULA 